A squall line developed across central Iowa during the overnight hours and moved east.  As the squall line entered southeast Iowa, it began to bow out and raced across Jefferson, Henry, Louisa, and Des Moines Counties causing extensive damage.  The bow echo crossed the Mississippi River and continued across Henderson, Warren, and Mercer Counties before weakening.  The squall line did manage to produce isolated severe damage in Bureau and Putnam Counties in Illinois.  The far southern edge of the squall line managed to produce isolated to scattered severe reports across Northeast Missouri, Lee County Iowa, and Hancock and McDonough counties in Illinois.  Scattered thunderstorms that developed in the near tropical atmosphere ahead of the squall line produced isolated severe reports.

Thunderstorm Wind in HENDERSON, ILLINOIS
From 08-JUN-05 11:54:00 to 08-JUN-05 12:22:00 (CST)
Location: COUNTYWIDE
Magnitude: 52 EG
Property damage: 10K
Crop damage: 20K
Reported by: LAW ENFORCEMENT

Bow echo crossed the Mississippi and affected mainly the northern half of the county.  The squall line had weakened and since the county was immediately south of the bow apex, damage was extremely sporatic but consisted of several trees down along with power lines down.  A building and irrigation system were damaged 3N of Bald Bluff by trees and a house was damaged in Stronghurst when a 24 inch diameter tree fell on it.  Based on radar, the following times have been established (all CST); 3N of Bald Bluff 1205-1214, Stronghurst 1214-1217.

Heavy Rain in HENRY, ILLINOIS
From 08-JUN-05 13:25:00 to 08-JUN-05 13:55:00 (CST)
Location: KEWANEE
Reported by: TRAINED SPOTTER

Water ponding on streets.

Thunderstorm Wind in BUREAU, ILLINOIS
From 08-JUN-05 14:20:00 to 08-JUN-05 14:23:00 (CST)
Location: TISKILWA
Magnitude: 50 EG
Reported by: TRAINED SPOTTER

Several trees down.

Thunderstorm Wind in WARREN, ILLINOIS
From 08-JUN-05 12:11:00 to 08-JUN-05 12:28:00 (CST)
Location: MONMOUTH
Magnitude: 52 EG
Property damage: 10K
Crop damage: 15K
Reported by: TRAINED SPOTTER

Trees down

Funnel Cloud in WARREN, ILLINOIS
From 08-JUN-05 12:19:00 to 08-JUN-05 12:19:00 (CST)
Location: ALEXIS
Reported by: TRAINED SPOTTER

Heavy Rain in MERCER, ILLINOIS
From 08-JUN-05 12:58:00 to 08-JUN-05 12:58:00 (CST)
Location: KEITHSBURG
Magnitude: 1.8 
Reported by: OFFICIAL NWS OBS.

Co-op reports 1.80 inches of rain in the past 2 hours.

Thunderstorm Wind in MCDONOUGH, ILLINOIS
From 08-JUN-05 12:38:00 to 08-JUN-05 12:41:00 (CST)
Location: MACOMB
Magnitude: 52 EG
Reported by: TRAINED SPOTTER

Thunderstorm Wind in MERCER, ILLINOIS
From 08-JUN-05 11:53:00 to 08-JUN-05 12:58:00 (CST)
Location: COUNTYWIDE
Magnitude: 57 EG
Property damage: 10K
Crop damage: 20K
Reported by: TRAINED SPOTTER

Bow echo crossed the Mississippi River and affected mainly the southern part of Mercer County.  The squall line had weakened from earlier so damage was much more sporatic with mainly trees and power lines down.  Based on radar data, the following times have been established (all CST); Keithsburg 1153-1203, Seaton 1212-1219, and 1W of New Windsor 1244-1254.

Thunderstorm Wind in HANCOCK, ILLINOIS
From 08-JUN-05 12:00:00 to 08-JUN-05 12:10:00 (CST)
Location: NAUVOO
Magnitude: 52 EG
Property damage: 3K
Reported by: DEPT OF HIGHWAYS

Trees down and Great River Rd.

Hail in HENRY, ILLINOIS
From 08-JUN-05 11:48:00 to 08-JUN-05 11:49:00 (CST)
Location: GENESEO
Magnitude: 0.75 
Reported by: NWS EMPLOYEE(OFF DUTY)

On Interstate 80 at mile marker 14.

Heavy Rain in MCDONOUGH, ILLINOIS
From 08-JUN-05 12:55:00 to 08-JUN-05 12:55:00 (CST)
Location: MACOMB
Reported by: TRAINED SPOTTER

Water ponding at the intersection of Jackson and Ward Streets.

Hail in PUTNAM, ILLINOIS
From 08-JUN-05 14:05:00 to 08-JUN-05 14:06:00 (CST)
Location: MC NABB
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

Also estimated 43 knot (50 mph) winds.

Thunderstorm Wind in MCDONOUGH, ILLINOIS
From 08-JUN-05 12:53:00 to 08-JUN-05 12:58:00 (CST)
Location: BUSHNELL
Magnitude: 52 EG
Property damage: 10K
Crop damage: 5K
Reported by: LAW ENFORCEMENT

Law enforcement reported 6 power poles and power lines down on IL 41 between IL routes 9 and 95.  One pole fell on a car but the driver was not injured.

Funnel Cloud in HENRY, ILLINOIS
From 08-JUN-05 12:54:00 to 08-JUN-05 12:56:00 (CST)
Location: WOODHULL
Reported by: TRAINED SPOTTER